linux-kernel - [PATCH] nl80211: ignore the length of hide ssid is zero in scan

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Message-Id: <20210128115652.8564-1-samirweng1979@163.com>
Date:   Thu, 28 Jan 2021 19:56:52 +0800
From:   samirweng1979 <samirweng1979@....com>
To:     johannes@...solutions.net, davem@...emloft.net, kuba@...nel.org
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        wengjianfeng <wengjianfeng@...ong.com>
Subject: [PATCH] nl80211: ignore the length of hide ssid is zero in scan

From: wengjianfeng <wengjianfeng@...ong.com>

If the length of hide ssid is zero in scan, don't pass
it to driver, which doesn't make any sense.

Signed-off-by: wengjianfeng <wengjianfeng@...ong.com>
---
 net/wireless/nl80211.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 775d0c4..d62e2aa 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8727,6 +8727,9 @@ static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
 				err = -EINVAL;
 				goto out_free;
 			}
+			/* ignore the length of hide ssid is zero */
+			if (nla_len(attr) == 0)
+				continue;
 			request->ssids[i].ssid_len = nla_len(attr);
 			memcpy(request->ssids[i].ssid, nla_data(attr),
 			       nla_len(attr));
-- 
1.9.1